Radiant syngas cooler for entrained-flow bed gasification and cooling method

Abstract

The invention discloses a radiant syngas cooler for entrained-flow bed gasification and a cooling method. A drum water cooling wall is arranged in the radiant syngas cooler; a height-diameter ratio ofthe radiant syngas cooler is at 3-8; long fin water cooling walls and short fin water cooling walls are uniformly distributed and staggered on the inner periphery of the drum water cooling wall; a heat shield is arranged in the drum water cooling wall; one end of the long fin water cooling walls away from the drum water cooling wall is connected with an outer wall of the heat shield; the upper top surface of the drum water cooling wall and the upper top surfaces of the fin water cooling walls are both lower than the upper top surface of the heat shield; the heat shield is arranged under an inlet of the radiant syngas cooler; a distance between the upper top surface of the heat shield and the upper top surface of the radiant syngas cooler is 0.5-1.5 times of the inner diameter of the radiant syngas cooler; the height of the heat shield is 0.05-0.2 times of the height of the fin water cooling walls; the diameter of the heat shield is 0.5-0.8 times of the inner diameter of the radiant syngas cooler. Due to the arrangement of the heat shield, the solid particles can be prevented from depositing in an easily slag-bonding area of the fin water cooling walls and the erosive wear of the slag and grains to the fin water cooling walls can be reduced.

Description

technical field [0001] The invention relates to a radiation waste pot and cooling method for air-flow bed gasification. Background technique [0002] High-efficiency and energy-saving coal gasification technology is the core technology and leading technology for the development of the coal chemical industry. The development of high-efficiency and energy-saving coal gasification technology is of great significance to promote the sustainable and efficient utilization of resources and ensure national energy security. Entrained bed gasifier occupies the mainstream position in the development of coal gasification technology due to its large processing capacity, high operating pressure and good environmental protection benefits. The entrained bed gasifier produces high-temperature crude syngas through the gasification / combustion chamber. In order to recover the heat in the high-temperature crude syngas, washing and cooling is generally carried out in a quenching manner, but the p...

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the unreasonable setting of the finned water wall of the radiation waste pot in the prior art, which will lead to a large amount of deposition of particles during operation, will affect the heat transfer effect, and will cause radiation in severe cases. The clogging defect of the waste pot, thereby providing a new type of radiation waste pot and cooling method for entrained bed gasification

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